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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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88 NO_EXTRA_FRAME = 0, | 88 NO_EXTRA_FRAME = 0, |
89 EXTRA_CALL_FRAME = 1 | 89 EXTRA_CALL_FRAME = 1 |
90 }; | 90 }; |
91 | 91 |
92 // Construct the IC structure with the given number of extra | 92 // Construct the IC structure with the given number of extra |
93 // JavaScript frames on the stack. | 93 // JavaScript frames on the stack. |
94 IC(FrameDepth depth, Isolate* isolate); | 94 IC(FrameDepth depth, Isolate* isolate); |
95 virtual ~IC() {} | 95 virtual ~IC() {} |
96 | 96 |
97 // Get the call-site target; used for determining the state. | 97 // Get the call-site target; used for determining the state. |
98 Code* target() const { return GetTargetAtAddress(address()); } | 98 Handle<Code> target() const { return target_; } |
| 99 Code* raw_target() const { return GetTargetAtAddress(address()); } |
| 100 |
99 inline Address address() const; | 101 inline Address address() const; |
100 | 102 |
101 // Compute the current IC state based on the target stub, receiver and name. | 103 // Compute the current IC state based on the target stub, receiver and name. |
102 static State StateFrom(Code* target, Object* receiver, Object* name); | 104 static State StateFrom(Code* target, Object* receiver, Object* name); |
103 | 105 |
104 // Clear the inline cache to initial state. | 106 // Clear the inline cache to initial state. |
105 static void Clear(Isolate* isolate, Address address); | 107 static void Clear(Isolate* isolate, Address address); |
106 | 108 |
107 // Computes the reloc info for this IC. This is a fairly expensive | 109 // Computes the reloc info for this IC. This is a fairly expensive |
108 // operation as it has to search through the heap to find the code | 110 // operation as it has to search through the heap to find the code |
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203 Address fp_; | 205 Address fp_; |
204 | 206 |
205 // All access to the program counter of an IC structure is indirect | 207 // All access to the program counter of an IC structure is indirect |
206 // to make the code GC safe. This feature is crucial since | 208 // to make the code GC safe. This feature is crucial since |
207 // GetProperty and SetProperty are called and they in turn might | 209 // GetProperty and SetProperty are called and they in turn might |
208 // invoke the garbage collector. | 210 // invoke the garbage collector. |
209 Address* pc_address_; | 211 Address* pc_address_; |
210 | 212 |
211 Isolate* isolate_; | 213 Isolate* isolate_; |
212 | 214 |
| 215 // The original code target that missed. |
| 216 Handle<Code> target_; |
| 217 |
213 DISALLOW_IMPLICIT_CONSTRUCTORS(IC); | 218 DISALLOW_IMPLICIT_CONSTRUCTORS(IC); |
214 }; | 219 }; |
215 | 220 |
216 | 221 |
217 // An IC_Utility encapsulates IC::UtilityId. It exists mainly because you | 222 // An IC_Utility encapsulates IC::UtilityId. It exists mainly because you |
218 // cannot make forward declarations to an enum. | 223 // cannot make forward declarations to an enum. |
219 class IC_Utility { | 224 class IC_Utility { |
220 public: | 225 public: |
221 explicit IC_Utility(IC::UtilityId id) | 226 explicit IC_Utility(IC::UtilityId id) |
222 : address_(IC::AddressFromUtilityId(id)), id_(id) {} | 227 : address_(IC::AddressFromUtilityId(id)), id_(id) {} |
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856 DECLARE_RUNTIME_FUNCTION(MaybeObject*, UnaryOpIC_Miss); | 861 DECLARE_RUNTIME_FUNCTION(MaybeObject*, UnaryOpIC_Miss); |
857 DECLARE_RUNTIME_FUNCTION(MaybeObject*, StoreIC_MissFromStubFailure); | 862 DECLARE_RUNTIME_FUNCTION(MaybeObject*, StoreIC_MissFromStubFailure); |
858 DECLARE_RUNTIME_FUNCTION(MaybeObject*, ElementsTransitionAndStoreIC_Miss); | 863 DECLARE_RUNTIME_FUNCTION(MaybeObject*, ElementsTransitionAndStoreIC_Miss); |
859 DECLARE_RUNTIME_FUNCTION(MaybeObject*, CompareNilIC_Miss); | 864 DECLARE_RUNTIME_FUNCTION(MaybeObject*, CompareNilIC_Miss); |
860 DECLARE_RUNTIME_FUNCTION(MaybeObject*, ToBooleanIC_Miss); | 865 DECLARE_RUNTIME_FUNCTION(MaybeObject*, ToBooleanIC_Miss); |
861 | 866 |
862 | 867 |
863 } } // namespace v8::internal | 868 } } // namespace v8::internal |
864 | 869 |
865 #endif // V8_IC_H_ | 870 #endif // V8_IC_H_ |
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